.top{
    height: 44px;
    width: 100%;
    background-color: darkcyan;
    line-height: 44px;
}
.top span{
    float: left;
    margin-left: 200px;
    color: white;
    font-size: 22px;
    width: 800px;
}
.back{
    float: right;
    width: 200px;
}
.back a{
    color: white;
}
.back a:hover{
    color: black;
}
.w{
    width: 1200px;
    margin: 10px auto;
}
.mid{
    width: 1000px;
    margin: 50px auto;
}
.book-img{
    float: left;
    width: 350px;
    height: 350px;
    background-color: #00AAFF;
}
.mess-box{
    float: left;
    width: 630px;
    margin-left: 10px;
}
.title{
    width: 100%;
    height: 120px;
    color: #323232;
    font-size: 23px;
    border-bottom: 1px solid silver;
}
.introduction{
    margin-top: 10px;
    color: #323232;
    font-weight: normal;
    font-size: 15px;
}
.autor-info{
    width: 630px;
    height: 25px;
    color: gray;
    font-size: 14px;
    margin-top: 10px;
}
.author,.type,.press,.press-time{
    float: left;
    width: 157px;
    height: 25px;
}
.price-info{
    height: 100px;
    width: 630px;
    background-color: #fcfaf7;
}
.price{
    float: left;
    width: 400px;
    height: 100px;
    padding: 10px;
}
.price .down{
    font-size: 26px;
    color: #e52222;
    margin-top: 10px;
}
.price .down i{
    font-size: 15px;
}
.price em{
    color: #1a66b3;
}
.buy{
    float: left;
    width: 230px;
    height: 100px;
    line-height: 100px;
    text-align: center;
}
.buy button{
    width: 100px;
    height: 34px;
    line-height: 34px;
    border-radius: 3px;
    border: 1px solid #ff2832;
    color: #ff2832 !important;
    background-color: #ffedee;
}
.buy button:hover{
    background-color: #ffebcd;
}
#surplus-count{
    width: 630px;
    height: 50px;
    line-height: 50px;
}
.borrow{
    width: 630px;
    height: 50px;
    text-align: center;
    line-height: 50px;
}
.borrow button{
    width: 150px;
    height: 40px;
    background-color: #00a1d6;
    color: white;
    text-align: center;
    line-height: 40px;
    border-radius: 5px;
}
.borrow button:hover{
    background-color: #00AAFF;
}
